Anti-vibration locking mechanism of telescopic handle of trolley suitcase

Abstract

This invention belongs to the technical field of luggage equipment, specifically relating to an anti-vibration locking mechanism for a telescopic handle of a suitcase. The mechanism includes a fixed rod and a telescopic rod. The telescopic rod is movably connected to the fixed rod along its length, allowing it to switch between a retracted position and an extended position. It also includes a clamping block, which is movably disposed relative to the fixed rod at least radially, allowing it to switch between a locking position and an unlocking position. A first linkage mechanism is provided between the clamping block and the telescopic rod, which drives the clamping block to switch from the unlocking position to the locking position when the telescopic rod switches from the retracted position to the extended position. This invention maintains the original smoothness of telescopic movement while significantly improving the structural rigidity and stability of the handle in its extended state. The entire process requires no additional user intervention, solving the swaying defects of traditional handles while maintaining ease of use.

Description

Technical Field

[0001] This invention belongs to the field of luggage equipment technology, specifically relating to an anti-vibration locking mechanism for a telescopic handle of a suitcase. Background Technology

[0002] In the design of telescopic handles for suitcases, a reasonable clearance is typically required between the outer and inner handles to ensure smooth telescopic movement. This design is based on two main considerations: firstly, an appropriate clearance prevents the handles from jamming due to thermal expansion and contraction; secondly, the clearance effectively reduces frictional resistance during relative movement. However, this necessary structural clearance can have significant side effects in actual use: when the inner handle is extended, the clearance between the handles transforms into radial play in use, causing noticeable radial wobble relative to the outer handle. This not only affects the user experience but may also reduce the structural stability of the handle. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide an anti-vibration locking mechanism for a telescopic handle of a suitcase that can improve the stability of the handle while ensuring smooth telescopic movement.

[0004] To achieve the above and other related objectives, the present invention provides an anti-shake locking mechanism for a telescopic handle of a suitcase, comprising a fixed rod and a telescopic rod; Both the fixed rod and the telescopic rod are tubular structures; The telescopic rod is inserted into the fixed rod and is movably connected to the fixed rod along its length, so that the telescopic rod can switch between the retracted position and the extended position; It also includes a clamping block, which is movably disposed relative to the fixed rod at least radially, so that the clamping block can switch between a locking position that presses against the outer wall of the telescopic rod and an unlocking position that releases the outer wall of the telescopic rod; A first linkage mechanism is provided between the clamping block and the telescopic rod. The first linkage mechanism is configured to drive the clamping block to switch from the unlocking position to the locking position when the telescopic rod switches from the retracting position to the extending position.

[0005] In an optional embodiment of the present invention, the telescopic rod is provided with a locking pin, and the fixed rod is provided with a pin hole that cooperates with the locking pin. The locking pin is movably disposed relative to the telescopic rod along its radial direction. A first elastic element is provided inside the telescopic rod. The first elastic element is assembled such that when the telescopic rod is in the extended position, the elastic force of the first elastic element can drive the locking pin to insert into the pin hole. One end of the telescopic rod is provided with a handle portion, and a button is provided on the handle portion. The button is connected to the locking pin through a transmission mechanism. The transmission mechanism is assembled such that when the button is pressed down, it can drive the locking pin to be pulled out from the pin hole into the telescopic rod.

[0006] In an optional embodiment of the present invention, a second linkage mechanism is provided between the transmission mechanism and the clamping block. The second linkage mechanism is configured to drive the clamping block to switch from the locking position to the unlocking position through the transmission mechanism and the second linkage mechanism when the button is pressed.

[0007] In an optional embodiment of the present invention, the first linkage mechanism includes a floating bracket, which is movably arranged along the length direction of the fixed rod. A fixed seat is provided on the fixed rod, and a movable seat is fixed on the floating bracket. The clamping block is movably connected to the movable seat along the radial direction of the fixed rod, and the movable seat is movably connected to the fixed seat along the length direction of the fixed rod. The clamping block and the fixed seat are provided with mutually cooperating inclined surfaces. The inclined surfaces are configured such that when the movable seat moves in the extension direction of the telescopic rod, the clamping block can move towards the outer wall of the telescopic rod under the compression of the inclined surfaces. A fixed bracket is provided on the fixed rod, and a second elastic element is provided between the floating bracket and the fixed bracket. The second elastic element is configured such that its elastic force can drive the floating bracket to move in the extension direction of the telescopic rod.

[0008] In an optional embodiment of the present invention, the floating bracket is configured to switch between a first position and a second position along the length direction of the fixed rod. In the first position, the inclined surfaces of the clamping block and the fixed seat are separated from each other, and in the second position, the inclined surfaces of the clamping block and the fixed seat abut against each other. A locking mechanism is provided between the floating bracket and the fixed rod. The locking mechanism is assembled such that when the floating bracket is in the first position, the locking mechanism can hold the floating bracket in the first position, and when the telescopic rod switches to the extension position, the locking pin can drive the locking mechanism to release the floating bracket from the first position, so that the floating bracket switches to the second position under the action of the second elastic element.

[0009] In an optional embodiment of the present invention, the locking mechanism includes an elastic arm that is elastically hinged to the floating bracket, and a protrusion provided on the outer wall of the fixed rod. The elastic arm has a stepped portion that cooperates with the protrusion. When the floating bracket is in the first position, the stepped portion abuts against the protrusion to prevent the floating bracket from moving to the second position. The pin hole is larger than the diameter of the locking pin in the length direction of the fixed rod, so that the locking pin can move in the pin hole along the length direction of the fixed rod after being inserted into the pin hole. The locking pin protrudes from the outer wall of the fixed rod. The elastic arm has a guide surface that cooperates with the locking pin. The guide surface is configured such that when the locking pin moves in the extension direction of the telescopic rod in the pin hole, the locking pin can squeeze the guide surface and drive the elastic arm to swing, so that the stepped portion disengages from the protrusion.

[0010] In an optional embodiment of the present invention, the elastic arm is provided with a limiting hook. When the floating bracket is in the second position, the limiting hook abuts against the side of the locking pin away from the guide surface to prevent the telescopic rod from moving toward the retracting position.

[0011] In an optional embodiment of the present invention, the transmission mechanism includes a pressure rod and a drive block. One end of the pressure rod is fixedly connected to the button, and the other end of the pressure rod abuts against the drive block. The drive block is movably disposed relative to the telescopic rod along its length. The locking pin is mounted on a slider that slides radially along the telescopic rod. The slider is provided with an inclined waist-shaped groove. The drive block is provided with a guide rod that cooperates with the waist-shaped groove. The inclination direction of the waist-shaped groove is configured such that when the drive block moves away from the handle portion, the drive block can drive the slider to move away from the pin hole, so that the locking pin is pulled out of the pin hole.

[0012] In an optional embodiment of the present invention, the second linkage mechanism includes a pressure block disposed on the drive block and a stop block disposed on the floating bracket. The stop block is movably connected to the floating bracket along the radial direction of the telescopic rod. The fixed rod is provided with a first hollow portion opposite to the stop block, and the telescopic rod is provided with a second hollow portion. When the telescopic rod is located at the extension position, the second hollow portion is disposed opposite to the stop block. A third elastic element is provided between the stop block and the floating bracket. The third elastic element is assembled such that when the telescopic rod is located at the extension position and the floating bracket is located at the second position, the third elastic element can drive the stop block to be inserted into the telescopic rod from the first hollow portion and the second hollow portion. At this time, the stop block is in contact with the side of the pressure block away from the handle portion. The side of the stop block away from the handle portion is provided with a wedge surface. When the floating bracket moves from the second position to the first position, the wedge surface can be squeezed by the edge of the first hollow portion, so that the stop block is pulled out from the telescopic rod.

[0013] In an optional embodiment of the invention, the side of the clamping block opposite to the outer wall of the telescopic rod is made of an elastic material.

[0014] The technical advantages of this invention are as follows: Through the cooperative design of the clamping block and the first linkage mechanism, this invention achieves an automatic locking function for the telescopic rod in its extended state. When the telescopic rod is pulled out from its retracted state, the first linkage mechanism keeps the clamping block in an unlocked state to ensure smooth pulling. When the telescopic rod is fully extended, the first linkage mechanism automatically drives the clamping block to radially press against the outer wall of the telescopic rod, effectively eliminating radial swaying caused by the fit gap. This structure maintains the original smoothness of extension and retraction while significantly improving the structural rigidity and stability of the rod in its extended state. Furthermore, the entire process requires no additional user intervention, solving the swaying defects of traditional rods while maintaining ease of use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the suitcase provided in an embodiment of the present invention; Figure 2 This is a perspective view of the telescopic rod provided in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of part of the I; Figure 4 This is a front view of the telescopic rod provided in an embodiment of the present invention; Figure 5 yes Figure 4 AA section view; Figure 6 yes Figure 5 BB cross-sectional view; Figure 7yes Figure 6 CC section view; Figure 8 yes Figure 7 A magnified view of part of the I; Figure 9 This is a cross-sectional view of the handle portion provided in an embodiment of the present invention; Figure 10 yes Figure 7 A cross-sectional view of the area shown in another state; Figure 11 yes Figure 6 A cross-sectional view of the area shown in another state; Figure 12 yes Figure 7 A cross-sectional view of the area shown in another state; Explanation of reference numerals in the attached drawings: 100, housing; 10, fixing rod; 101, pin hole; 102, first hollow part; 11, protrusion; 12, fixing seat; 20, telescopic rod; 201, second hollow part; 21, locking pin; 210, slider; 211, waist-shaped groove; 22, first elastic element; 30, fixed bracket; 40, floating bracket; 41, elastic arm; 411, step part; 412, guide surface; 413, limit hook; 42, movable seat; 43, clamping block; 44, stop block; 45, third elastic element; 50, second elastic element; 60, handle part; 61, button; 62, pressure rod; 63, drive block; 64, guide rod; 65, pressure block. Detailed Implementation

[0016] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0017] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] A suitcase's telescopic handle consists of a fixed section and several telescopic sections. The number of telescopic sections depends on the suitcase's size; for example, when the suitcase is tall, only one telescopic section may be used, inserted into the fixed section. To ensure smooth telescopic movement, a reasonable clearance is typically maintained between the fixed and telescopic sections to prevent jamming due to thermal expansion and contraction. This clearance effectively reduces frictional resistance during relative movement. However, this necessary structural clearance can lead to radial play between the telescopic and fixed sections when extended, causing noticeable radial wobble relative to the fixed section. This not only affects the user experience but may also reduce the handle's structural stability. To address this, the present invention incorporates a clamping device between the telescopic rod and the fixed rod. During the extension of the telescopic rod, the clamping device remains in a relaxed state, ensuring smooth withdrawal of the telescopic rod. Once the telescopic rod reaches its extended state, the clamping device automatically clamps the telescopic rod to prevent it from wobbling. Furthermore, the clamping device is linked to the locking release button of the lever mechanism itself. When the user presses the button on the handle, the clamping device is simultaneously driven to release the telescopic rod again, thereby ensuring smooth retraction of the telescopic rod.

[0019] The technical solution of the present invention will be described in detail below with reference to specific embodiments: Please see Figure 1-12 As shown, an embodiment of the present invention provides a trolley case, the trolley case including a case body 100 and a telescopic rod with an anti-vibration locking mechanism, the telescopic rod including a fixed rod 10 and a telescopic rod 20; both the fixed rod 10 and the telescopic rod 20 are tubular structures; the telescopic rod 20 is inserted into the fixed rod 10 and is movably connected to the fixed rod 10 along its length, so that the telescopic rod 20 can switch between a retracted position and an extended position; it also includes a clamping block 43, the clamping block 43 being movably disposed relative to the fixed rod 10 at least radially, so that the clamping block 43 can switch between a locking position that presses against the outer wall of the telescopic rod 20 and an unlocking position that releases the outer wall of the telescopic rod 20; a first linkage mechanism is provided between the clamping block 43 and the telescopic rod 20, the first linkage mechanism being configured to drive the clamping block 43 to switch from the unlocking position to the locking position when the telescopic rod 20 switches from the retracted position to the extended position.

[0020] This invention achieves an automatic locking function for the telescopic rod 20 in its extended state through the cooperative design of the clamping block 43 and the first linkage mechanism: when the telescopic rod 20 is pulled out from its retracted state, the first linkage mechanism keeps the clamping block 43 in the unlocked state to ensure smooth pulling; when the telescopic rod 20 is fully extended, the first linkage mechanism automatically drives the clamping block 43 to radially press against the outer wall of the telescopic rod 20, effectively eliminating radial swaying caused by the fit gap. This structure maintains the original smoothness of extension and retraction while significantly improving the structural rigidity and stability of the rod in its extended state. Furthermore, the entire process requires no additional user intervention, solving the swaying defects of traditional rods while maintaining ease of use.

[0021] Please see Figure 6 , 9 As shown, in an optional embodiment of the present invention, the telescopic rod 20 is provided with a locking pin 21, and the fixed rod 10 is provided with a pin hole 101 that cooperates with the locking pin 21. The locking pin 21 is movably disposed relative to the telescopic rod 20 along the radial direction of the telescopic rod 20. A first elastic element 22 is provided inside the telescopic rod 20. The first elastic element 22 is assembled such that when the telescopic rod 20 is in the extended position, the elastic force of the first elastic element 22 can drive the locking pin 21 to insert into the pin hole 101. One end of the telescopic rod 20 is provided with a handle portion 60. A button 61 is provided on the handle portion 60. The button 61 is connected to the locking pin 21 through a transmission mechanism. The transmission mechanism is assembled such that when the button 61 is pressed down, it can drive the locking pin 21 to be pulled out from the pin hole 101 into the telescopic rod 20. A spring for driving the button 61 to reset is provided between the button 61 and the handle portion 60. This embodiment achieves rigid locking when the telescopic rod 20 is extended to its full position through the mechanical interlocking of the locking pin 21 and the pin hole 101, combined with the automatic elastic drive of the first elastic element 22. This effectively prevents the rod from accidentally retracting under load or bumpy conditions. Specifically, when the telescopic rod 20 reaches the extended position, the elastic element automatically springs the locking pin 21 into the pin hole 101 of the fixed rod 10 to form a mechanical block. When the user actively presses the button 61, the locking pin 21 can be driven to be pulled out of the pin hole 101 through the transmission mechanism, thereby releasing the above-mentioned locking state and ensuring that the telescopic rod 20 can retract smoothly.

[0022] Please see Figure 7 , 8As shown in Figures 10 and 12, in an optional embodiment of the present invention, a second linkage mechanism is provided between the transmission mechanism and the clamping block 43. The second linkage mechanism is configured to drive the clamping block 43 from the locking position to the unlocking position through the transmission mechanism and the second linkage mechanism when the button 61 is pressed. In this embodiment, the clamping block 43 is mechanically coupled with the locking button 61 through the second linkage mechanism, realizing the linkage between anti-shake locking and telescopic functions. When the user presses the button 61 to release the locking pin 21, the second linkage mechanism simultaneously drives the clamping block 43 to radially release the telescopic rod 20, ensuring that the telescopic rod 20 has neither mechanical interference nor additional frictional resistance during the retraction process. At the same time, the mechanical linkage ensures the accuracy of the operation sequence and avoids jamming problems caused by the clamping device not being released in time.

[0023] Please see Figure 5 , 7 As shown in Figures 8 and 10, in an optional embodiment of the present invention, the first linkage mechanism includes a floating bracket 40, which is movably arranged along the length direction of the fixed rod 10. The fixed rod 10 is provided with a fixed seat 12, and a movable seat 42 is fixed on the floating bracket 40. The clamping block 43 is movably connected to the movable seat 42 along the radial direction of the fixed rod 10, and the movable seat 42 is movably connected to the fixed seat 12 along the length direction of the fixed rod 10. The clamping block 43 and the fixed seat 12 are provided with mutually cooperating inclined surfaces. The inclined surfaces are configured such that when the movable seat 42 moves in the extension direction of the telescopic rod 20, the clamping block 43 can move towards the outer wall of the telescopic rod 20 under the compression of the inclined surfaces. The fixed rod 10 is provided with a fixed bracket 30, and a second elastic element 50 is provided between the floating bracket 40 and the fixed bracket 30. The second elastic element 50 is assembled such that its elastic force can drive the floating bracket 40 to move in the extension direction of the telescopic rod 20. This embodiment achieves the self-locking function of the telescopic rod 20 during the stretching process through the synergistic action of the inclined plane linkage mechanism and the elastic element. When the user pulls the telescopic rod 20 outward, the floating bracket 40 moves synchronously under the push of the second elastic element 50. The axial tension is converted into radial clamping force through the inclined plane cooperation between the movable seat 42 and the fixed seat 12. The greater the tension on the telescopic rod 20, the stronger the clamping force of the clamping block 43 on the rod body. After full extension, the locking force is automatically enhanced by the load.

[0024] Please see Figure 3 , 5As shown in Figures 8 and 10, in an optional embodiment of the present invention, the floating bracket 40 is configured to switch between a first position and a second position along the length direction of the fixed rod 10. In the first position, the inclined surfaces of the clamping block 43 and the fixed seat 12 are separated from each other, and in the second position, the inclined surfaces of the clamping block 43 and the fixed seat 12 abut against each other. A locking mechanism is provided between the floating bracket 40 and the fixed rod 10. The locking mechanism is configured such that when the floating bracket 40 is in the first position, the locking mechanism can hold the floating bracket 40 in the first position, and when the telescopic rod 20 switches to the extension position, the locking pin 21 can drive the locking mechanism to release the floating bracket 40 from the first position, so that the floating bracket 40 switches to the second position under the action of the second elastic element 50. When the telescopic rod 20 is in the process of extension and retraction, the locking mechanism fixes the floating bracket 40 in the first position, keeping the clamping block 43 in a separated state, ensuring that the telescopic rod 20 can slide freely without frictional resistance; when the telescopic rod 20 is fully extended, the locking pin 21 triggers the locking mechanism to release the floating bracket 40, which automatically moves to the second position under the action of the elastic element, and drives the clamping block 43 to press the telescopic rod 20 through the inclined plane mechanism. This maintains the smoothness of the rod operation and ensures rigid support during use. The two working conditions are seamlessly switched through mechanical linkage.

[0025] Please see Figure 3 , 5As shown in Figure 6, in an optional embodiment of the present invention, the locking mechanism includes an elastic arm 41 elastically hinged to the floating bracket 40, and a protrusion 11 provided on the outer wall of the fixed rod 10. The elastic arm 41 is provided with a stepped portion 411 that cooperates with the protrusion 11. When the floating bracket 40 is in the first position, the stepped portion 411 abuts against the protrusion 11 to prevent the floating bracket 40 from moving to the second position. The pin hole 101 is larger in the length direction of the fixed rod 10 than the diameter of the locking pin 21. The locking pin 21 is inserted into the pin hole 101 and can move within the pin hole 101 along the length of the fixing rod 10. The locking pin 21 protrudes from the outer wall of the fixing rod 10. The elastic arm 41 is provided with a guide surface 412 that cooperates with the locking pin 21. The guide surface 412 is configured such that when the locking pin 21 moves in the extension direction of the telescopic rod 20 within the pin hole 101, the locking pin 21 can press the guide surface 412 and drive the elastic arm 41 to swing, so that the step portion 411 disengages from the protrusion 11. This embodiment simplifies the unlocking mechanism of the floating bracket 40 through the linkage design of the locking pin 21 and the guide surface 412 of the elastic arm 41. When the telescopic rod 20 is extended to its position, the radial movement of the locking pin 21 within the pin hole 101 will naturally press the guide surface 412 of the elastic arm 41, and the step portion 411 will disengage from the protrusion 11 by utilizing the movement trajectory of the locking pin 21 itself, thus eliminating the need for additional unlocking control components.

[0026] Please see Figure 3 , 5 As shown, in an optional embodiment of the present invention, the elastic arm 41 is provided with a limiting hook 413. When the floating bracket 40 is in the second position, the limiting hook 413 abuts against the side of the locking pin 21 away from the guide surface 412 to prevent the telescopic rod 20 from moving toward the retraction position. The locking pin 21 is constrained by the limiting hook 413 to avoid the possibility of accidental retraction.

[0027] Please see Figure 6 , 9As shown in Figure 11, in an optional embodiment of the present invention, the transmission mechanism includes a pressure rod 62 and a drive block 63. One end of the pressure rod 62 is fixedly connected to the button 61, and the other end of the pressure rod 62 abuts against the drive block 63. The drive block 63 is movably disposed relative to the telescopic rod 20 along its length. The locking pin 21 is mounted on a slider 210 that slides radially along the telescopic rod 20. The slider 210 has an inclined waist-shaped groove 211. The drive block 63 has a guide rod 64 that cooperates with the waist-shaped groove 211. The inclination direction of the waist-shaped groove 211 is configured such that when the drive block 63 moves away from the handle portion 60, the drive block 63 can drive the slider 210 to move away from the pin hole 101, so that the locking pin 21 is pulled out of the pin hole 101. Please refer to [reference missing]. Figure 7 , 9 As shown in Figure 11, the second linkage mechanism includes a pressure block 65 on the drive block 63 and a stop block 44 on the floating bracket 40. The stop block 44 is movably connected to the floating bracket 40 along the radial direction of the telescopic rod 20. The fixed rod 10 is provided with a first hollow portion 102 opposite to the stop block 44, and the telescopic rod 20 is provided with a second hollow portion 201. When the telescopic rod 20 is in the extension position, the second hollow portion 201 is opposite to the stop block 44. A third elastic element 45 is provided between the stop block 44 and the floating bracket 40. The third elastic element 45 is assembled such that when the extension... When the telescopic rod 20 is located at the extension position and the floating bracket 40 is located at the second position, the third elastic element 45 can drive the stop 44 to be inserted into the telescopic rod 20 from the first hollow part 102 and the second hollow part 201. At this time, the stop 44 is in contact with the side of the pressure block 65 away from the handle part 60. The side of the stop 44 away from the handle part 60 is provided with a wedge surface. When the floating bracket 40 moves from the second position to the first position, the wedge surface can be squeezed by the edge of the first hollow part 102 so that the stop 44 is pulled out from the telescopic rod 20. This embodiment achieves dual unlocking functionality under a single button 61 operation through the linkage design of the stop block 44 and the pressure block 65. When the button 61 is pressed, the drive block 63 completes two key actions simultaneously through the pressure rod 62: the locking pin 21 is pulled back by the waist-shaped groove 211 mechanism to release the main lock, and the floating bracket 40 is pushed back to the first position by the pressure block 65, so that the floating bracket 40 is relocked by the locking mechanism. At the same time, during the process of the floating bracket 40 returning to the first position, the stop block 44 automatically pulls away from under the pressure block 65 to prevent interference with the subsequent retraction of the telescopic rod 20, simplifying the complex unlocking process into a single press action, greatly improving the convenience and smoothness of the telescopic rod 20 retraction operation.

[0028] In an optional embodiment of the present invention, the side of the clamping block 43 opposite to the outer wall of the telescopic rod 20 is made of an elastic material. When the clamping block 43 is pressed, the elastic material can adapt to the slight unevenness of the outer wall of the telescopic rod 20, and increase the actual contact area through elastic deformation, thus maintaining sufficient friction while avoiding abnormal noise and wear that may be caused by direct metal contact.

[0029] The specific principle of the telescopic rod of the present invention is as follows: During the outward pulling of the telescopic rod 20, when the telescopic rod 20 is about to reach the extension position, the locking pin 21 springs into the pin hole 101, as... Figure 5 , 6 As shown, during this process, the floating support 40 is in Figure 7 , 8 At the position shown, clamp 43 is not pressed tightly against the outer wall of telescopic rod 20; then continue to pull telescopic rod 20, as... Figure 5 As shown, the locking pin 21 moves upward along the pin hole 101 and presses the elastic arm 41, causing the elastic arm 41 to disengage from the protrusion 11. At this time, the floating bracket 40 moves to the position under the elastic force of the second elastic element 50. Figure 10 At the indicated position, the clamping block 43 presses against the outer wall of the telescopic rod 20. At the same time, the stop block 44 protrudes below the pressure block 65 under the elastic force of the third elastic element 45, and the telescopic rod 20 is completely fixed.

[0030] When the telescopic rod 20 needs to be retracted, the user presses the button 61. The button 61 drives the locking pin 21 to be pulled out of the pin hole 101 via the transmission mechanism. Figure 11 As shown, at the same time, the pressure block 65 presses down on the stop block 44, and the stop block 44 drives the floating bracket 40 to move downward until the elastic arm 41 is in place. Figure 5 As shown, it is re-locked onto protrusion 11. Additionally, as... Figure 10 , 12 As shown, during the downward movement of the stop block 44, the lower end of the wedge-shaped surface of the stop block 44 is squeezed by the bottom edge of the first hollow part 102, causing the stop block 44 to gradually be pulled away from under the pressure block 65, as shown. Figure 12 As shown, at this time, it is necessary to ensure that before the stop block 44 is completely pulled away from under the pressure block 65, the step portion 411 on the elastic arm 41 has moved to below the protrusion 11. Ensure that after the stop block 44 is completely separated from the pressure block 65, the step portion 411 can abut against the protrusion 11, thereby keeping the floating bracket 40 in the first position again. Finally, press the handle portion 60 firmly until the telescopic rod 20 reaches the retraction position, and the telescopic rod 20 can be retracted into the fixed rod 10.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A shock-absorbing locking mechanism for a telescopic handle of a suitcase, characterized in that, Includes a fixed rod (10) and a telescopic rod (20); Both the fixed rod (10) and the telescopic rod (20) are tubular structures; The telescopic rod (20) is inserted into the fixed rod (10) and is movably connected to the fixed rod (10) along the length direction so that the telescopic rod (20) can switch between the retracting position and the extending position; It also includes a clamping block (43) which is movably disposed relative to the fixing rod (10) at least radially along the fixing rod (10) so that the clamping block (43) can switch between a locking position that presses against the outer wall of the telescopic rod (20) and an unlocking position that releases the outer wall of the telescopic rod (20); A first linkage mechanism is provided between the clamping block (43) and the telescopic rod (20). The first linkage mechanism is configured to drive the clamping block (43) to switch from the unlocking position to the locking position when the telescopic rod (20) switches from the retracting position to the extending position. The telescopic rod (20) is provided with a locking pin (21), and the fixed rod (10) is provided with a pin hole (101) that cooperates with the locking pin (21). The locking pin (21) is movably arranged relative to the telescopic rod (20) along the radial direction of the telescopic rod (20). The telescopic rod (20) is provided with a first elastic element (22). The first elastic element (22) is assembled such that when the telescopic rod (20) is located in the extension position, the elastic force of the first elastic element (22) can drive the locking pin (21) to insert into the pin hole (101). One end of the telescopic rod (20) is provided with a handle (60). The handle (60) is provided with a button (61). The button (61) is connected to the locking pin (21) through a transmission mechanism. The transmission mechanism is assembled such that when the button (61) is pressed down, it can drive the locking pin (21) to be pulled out from the pin hole (101) into the telescopic rod (20). A second linkage mechanism is provided between the transmission mechanism and the clamping block (43). The second linkage mechanism is configured to drive the clamping block (43) from the locking position to the unlocking position through the transmission mechanism and the second linkage mechanism when the button (61) is pressed. The first linkage mechanism includes a floating bracket (40), which is movably arranged along the length direction of the fixed rod (10). A fixed seat (12) is provided on the fixed rod (10), and a movable seat (42) is fixed on the floating bracket (40). A clamping block (43) is movably connected to the movable seat (42) along the radial direction of the fixed rod (10), and the movable seat (42) is movably connected to the fixed seat (12) along the length direction of the fixed rod (10). The clamping block (43) and the fixed seat (12) are provided with mutually... The inclined surface is configured such that when the movable seat (42) moves in the extension direction of the telescopic rod (20), the clamping block (43) can move towards the outer wall of the telescopic rod (20) under the compression of the inclined surface; a fixed bracket (30) is provided on the fixed rod (10), and a second elastic element (50) is provided between the floating bracket (40) and the fixed bracket (30). The second elastic element (50) is configured such that its elastic force can drive the floating bracket (40) to move in the extension direction of the telescopic rod (20); The floating bracket (40) is configured to switch between a first position and a second position along the length direction of the fixed rod (10). In the first position, the inclined surfaces of the clamping block (43) and the fixed seat (12) are separated from each other, and in the second position, the inclined surfaces of the clamping block (43) and the fixed seat (12) abut against each other. A locking mechanism is provided between the floating bracket (40) and the fixed rod (10). The locking mechanism is configured to hold the floating bracket (40) in the first position when the floating bracket (40) is in the first position, and to drive the locking pin (21) to release the floating bracket (40) from the first position when the telescopic rod (20) switches to the extension position, so that the floating bracket (40) switches to the second position under the action of the second elastic element (50).

2. The anti-vibration locking mechanism for the telescopic handle of the suitcase according to claim 1, characterized in that, The locking mechanism includes an elastic arm (41) that is elastically hinged to the floating bracket (40), and a protrusion (11) provided on the outer wall of the fixed rod (10). The elastic arm (41) is provided with a stepped portion (411) that cooperates with the protrusion (11). When the floating bracket (40) is in the first position, the stepped portion (411) and the protrusion (11) abut against each other to prevent the floating bracket (40) from moving to the second position. The pin hole (101) is larger in the length direction of the fixed rod (10) than the diameter of the locking pin (21) so that the locking pin (21) can be inserted. The pin hole (101) can move within the pin hole (101) along the length direction of the fixing rod (10); the locking pin (21) protrudes from the outer wall of the fixing rod (10), and the elastic arm (41) is provided with a guide surface (412) that cooperates with the locking pin (21). The guide surface (412) is configured such that when the locking pin (21) moves in the extension direction of the telescopic rod (20) within the pin hole (101), the locking pin (21) can squeeze the guide surface (412) and drive the elastic arm (41) to swing so that the step portion (411) disengages from the protrusion (11).

3. The anti-vibration locking mechanism for the telescopic handle of the suitcase according to claim 2, characterized in that, The elastic arm (41) is provided with a limiting hook (413). When the floating bracket (40) is in the second position, the limiting hook (413) abuts against the side of the locking pin (21) away from the guide surface (412) to prevent the telescopic rod (20) from moving toward the retracting position.

4. The anti-vibration locking mechanism for the telescopic handle of a suitcase according to claim 2, characterized in that, The transmission mechanism includes a pressure rod (62) and a drive block (63). One end of the pressure rod (62) is fixedly connected to the button (61), and the other end of the pressure rod (62) abuts against the drive block (63). The drive block (63) is movably arranged relative to the telescopic rod (20) along the length direction of the telescopic rod (20). The locking pin (21) is installed on a slider (210) that slides radially along the telescopic rod (20). The slider (210) is provided with... The drive block (63) has an inclined waist-shaped groove (211) and a guide rod (64) that cooperates with the waist-shaped groove (211). The inclined direction of the waist-shaped groove (211) is configured such that when the drive block (63) moves away from the handle portion (60), the drive block (63) can drive the slider (210) to move away from the pin hole (101) so that the locking pin (21) is pulled out from the pin hole (101).

5. The anti-vibration locking mechanism for the telescopic pull rod of the suitcase according to claim 4, characterized in that, The second linkage mechanism includes a pressure block (65) on the drive block (63) and a stop block (44) on the floating bracket (40). The stop block (44) is movably connected to the floating bracket (40) along the radial direction of the telescopic rod (20). The fixed rod (10) is provided with a first hollow part (102) opposite to the stop block (44), and the telescopic rod (20) is provided with a second hollow part (201). When the telescopic rod (20) is located at the extension position, the second hollow part (201) is arranged opposite to the stop block (44). A third elastic element (45) is provided between the stop block (44) and the floating bracket (40). The third elastic element (45) is assembled such that when the extension... When the telescopic rod (20) is located at the extension station and the floating bracket (40) is located at the second position, the third elastic element (45) can drive the stop (44) to be inserted into the telescopic rod (20) from the first hollow part (102) and the second hollow part (201). At this time, the stop (44) is in contact with the side of the pressure block (65) away from the handle part (60). The side of the stop (44) away from the handle part (60) is provided with a wedge surface. When the floating bracket (40) moves from the second position to the first position, the wedge surface can be squeezed by the edge of the first hollow part (102) so that the stop (44) is pulled out from the telescopic rod (20).

6. The anti-vibration locking mechanism for the telescopic pull rod of the suitcase according to claim 1, characterized in that, The side of the clamp (43) opposite to the outer wall of the telescopic rod (20) is made of an elastic material.

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